21331045435 has 16 divisors (see below), whose sum is σ = 29312188416. Its totient is φ = 14597911008.

The previous prime is 21331045403. The next prime is 21331045451. The reversal of 21331045435 is 53454013312.

It is a cyclic number.

It is not a de Polignac number, because 21331045435 - 2⁵ = 21331045403 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21331045397 and 21331045406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588219 + ... + 623428.

It is an arithmetic number, because the mean of its divisors is an integer number (1832011776).

Almost surely, 2^21331045435 is an apocalyptic number.

21331045435 is a deficient number, since it is larger than the sum of its proper divisors (7981142981).

21331045435 is a wasteful number, since it uses less digits than its factorization.

21331045435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212162.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 21331045435 its reverse (53454013312), we get a palindrome (74785058747).

The spelling of 21331045435 in words is "twenty-one billion, three hundred thirty-one million, forty-five thousand, four hundred thirty-five".